Happen to have a Moodle on Google Cloud but not sure of what we are looking at with your screen shot.
Also not sure of what you installed via Google's 'store' ... Debian with a pre-built/configured Moodle instance on Bitnami by chance? or some other package that combined Apache/MySQL/PHP and a Moodle?
Change of IP address for the GCP and the Moodle had been running, sounds like one needs to edit the config.php file contained in the directory for moodle code and change the variable for $CFG->wwwroot from old IP to new IP.
If I am incorrect with that guess, then please provide some more information about your setup.
'spirit of sharing', Ken